LM334Z/NOPB – TEXAS INSTRUMENTS

The LM334Z/NOPB is a precision current regulator, specifically a thermally compensated bandgap reference offering a highly stable output current. Unlike many current regulators, the LM334Z/NOPB’s output current is directly proportional to its absolute temperature, enabling its use in temperature-sensing applications. Its output current is set by a single external resistor, offering design flexibility. The device operates over a wide voltage range, typically from 3V to 30V, making it suitable for diverse power supply configurations. Its output current can be precisely set from 1µA to 10mA, with a typical accuracy of ±2% at 25°C. Packaged in a space-saving SOT-23 (TO-236AB) surface-mount package, the /NOPB suffix denotes lead-free, RoHS-compliant construction. The LM334Z excels in applications requiring precise current sources, such as LED current limiting, charge pumps, and simple current-to-voltage converters. Its inherent temperature compensation simplifies circuit design, reducing the need for additional components compared to less precise alternatives. However, it’s important to note the relatively high minimum voltage requirement for optimal performance. Its low quiescent current contributes to improved power efficiency in battery-powered systems.